Automatic release implement hitch



NOV. 3, 1931. LANG 1,830,739

AUTOMATIC RELEASE IMPLEMENT HITCH Filed Jan. 30. 1930' 2 Sheets-Sheet 1 F IG. 1.

1 o 0 .Q! o o F l6 0 5 g [a 0| 1 U o D u 5 O O 4| 36 35 3% 3 INVENTOR.

Andrew Lan ATTORNEYS.

Nov. 3, 1931. A. LANG 1,830,739

AUTOMATIC RELEASE IMPLEMENT HITCH Filed Jan. 30. 1930 2 Sheets-Sheet 2 FIG. 3.

FIG. 5. 2O Q1210 l\\\ V l All u FIG. 6.

INVENTOR.

ncIr aw Lag ATTORN EYS.

Patented Nov. 3, 1931 UNITED STATES PATENT OFFICE ANDREW LANG, OI MOBRIDGE, SOUTH DAKOTA, ASSIGNOR OF ONE-HALF TO CARI: GUSTAV FRISTAD, F MANDAN, NORTH DAKOTA AUTOMATIC v."RililLEASIIl. IHIPLEMEN'I. HITCH Application filed January 30, 1930. Serial No. 424,668.

1 under such conditions which impose an abnormal draft upon the hitch.

Another object of the invention is to provide an automatic release of this character which may be easily applied to the ordinary automatic release plow hitch without changing the construction or adjustment thereof and at the same time is maintained in coupled relation to the plow hitch and is released automatically upon the release of the plow hitch so that both the plow and the implements are simultaneously disconnected from the tractor.

The invention further aims at the provision of a hitch aracter which whi e dis- DS-SCi l S.

7, so to the plow as properly n i it 1a). plements behind the plow during all move- 39 ments of the latter, and which is automatically released simultaneously with the release of the plow from the tractor With the foregoing and other objects in view, the invention will be more fully described hereinafter, and will be more particularly pointed out in the claims appended hereto.

In the drawings, wherein like symbols refer On Luau to like or corresponding parts throughout plow frame and with the parts coupled together.

Figure 2 is a like view showing the parts released.

Figure 3 is a longitudinal section taken throughone side of the automatic hitch sub stantially on the line 33 of Figure 1.

Figure 4 is a transverse section taken lengthwise through the equalizing bar and substantially on the line 4-4 of Figure 1.

Figure 5 is a detail enlarged section taken Zhrough the bracket and draw bar connec- Figure 6 is an enlarged fragmentary transverse section taken on the line 66 of Figure 1 through the plow frame, showin theguiding connection of the improved hi ch mounted thereon, and

Figure 7 is a fragmentary transverse section taken through the same.

Referring to the drawings, 10 desi nates a tractor of any approved type provi ed at its rear end with a draw bar 11 carrying a coup" pin to which is con-nee evaded gagein the 3.2 g action coir ventional and the matic release device 1'? is adapted to operate for releasing the hook 18 from the ring 13 when the plow it meets ohstructions tending to stop the plow and increasing the draft on the tongue 16 beyond a predetermined fixed pressure. so

The present invention embodies an attachment which'operates substantially in parallel relation with the tongue 16 and adjacent parts for independently coupling implements, such as packers, drills, harrows and the like for operation behind the plow 14, directl to the tractor draw bar 11 to olfset any si e draft or additional draft pressure upon or through the frame 14. To this end, the present invention provides a bracket arm 19 which is adr ii the implement a iustahly secured by bolts 20 or the like to the d'a'ft bar 11 of the tractor, the bracket 19 extending laterally outward from the tractor lO'and being arched rearwardly to give ample clearance to the adjacent rear wheel of the tractor.

The bracket 19 is in the form of a fiat bar, and at its outer end portion is provided with a series of spaced apart openings 21 through which is selectively positioned a coupling bolt 22 which has its upper head portion counter sunk in the upper face of a link 23, the latter extending rearwardly from the bracket- 19. 'lho rear end of the link 213 carries a Vertically lrPOSQLl bolt 24 beneath the head of which is disguised a keeper plate 25 which is spaced a ove the link 23 and held in overhanging "elation therewith by means of a spacing nediate por- 1% Into when t hung Jo adapted LO haw ionnovement benea bar the keeper plate :1; in the relative sioe sway between the dral evice and the tractor 10.

'ir.l.ill7,lllg bar 's pivotally 1 counted s inner end upon a bolt 29 which is secured :iEZul'" "he tongue lb rearwardly of the autodevice 1?, and tirough the forl of a diagonal brace 89 which exis b-ickwardly and outwardly from L 1e "tongue 16 from which the equalisg extends.

ril

cuuahziizn oar is provided interlili'glliil its onus wit series of 101191. naliy snacco apari ope leciircl receive the hich flan r "main 231 is connectc upon :2 bolt 3 i sine is anc is adapted for conct-iou at r-is rear end to the tongue i (la )ted to be drawn or tot; in rear of the plow frame 1 he spacing bar 39 is adapted to extend the forward end portion of the plow time 1-1 and at its inner end is pivotally :.unte upon bolt 42 which I i" ends upwasher 45 which overlaps the inner end of the.

spacing bar 39 and is adapted to hold the bar from rising from the bolt, the bushing ll providing a cylindrical bearing surface of suitable size to support the spacing bar in cident to the wear and tear imposed thereon.

The bracket arm 43 is turned down at the outer side of the plow frame 1% and is secured thereto by clamp bolts 46 or the like which extend through the frame 11' and the adjacent parts thereof as shown in Figure 6.

Yr'hen the tractor 10 is in motion and drawing the plow 12 the tongue 16 provides the connection between the tractor an plow and is permitted to sw nor coupling pin 19 to assni 1e various an" relations in the l swingini; Zl'lOY-QD L 4 i equalizing bar 225 1: e irr outer end lherec plate 25, the roller contact of the bar retarding mow-sine tongue 'lhe n v c scntcd at ll. is; (lillf' equalizing bar 28 by the cha n 3% the draft heir": taken up lhrourjh the link :2 and the bracket arin lci'i'ig bl r lil serves me c chain 31 and the dr: 'it bar ll) laterally of e plow frame ll and to insure that there is it v linite and predcterlaincd relation h i ween irli i ls l Q :Ll ii is Liillh aiwa in (Ul'l'QPL plow.

ion "'l c tonnne l.

'a' c release l -vv i as hilflull in it is thus seen iillll (he inipicincnt -11 is drawn directly from the im (or ill and is held by the Sphl'l liar ilil in correct position relatively to the plow l-l; and is simultaneous- 1y l autoniaiicall i Hiu'ouplcd from the tract 1 10 when the plow l-' is released theretroii. li hile he attachment is dcpeinlcnt upon and controlled by the ope ations and movements of the hitch between the plow and the lractoi. it docs not in any way interfcc with the normal ope 'ation of the plow hut in, the event an obstruction in the ue implement 1, causes this implement to halt, the consequent abnormal draft upon the hitch would release the plow from the tractor in the manner heretofore stated.

It is obvious that various changes and modifications may be made in the details of construction and design of the above speclfically described embodiment of this invention without departing from the spirit thereof, such changes and modifications being restricted only by the scope of the following claims.

\Vhat is claimed is 1. In combination with a tractor, a trailing unit and an automatically releasable hitch between the tractor and the trailing unit, an implement draft connection adjacent the trailing unit for drawing an implement for co-operation with the trailing unit, means for maintaining the draft connection in predetermined relation adjacent the trailing unit, and a releasable device arranged between the draft connection and the tractor to the exclusion of the automatically releasable hitch for the trailing unit and connected thereto for simultaneous release therewith.

2. In combination with a tractor, a plow and an automatically releasable hitch between the tractor and the plow, a bracket mounted on one side of the tractor and having akeeper device at its outer end, an equalizing bar pivotally mounted on the plow hitch at one end and slidably mounted at its other end in the keeper device, a flexible draft device adjustably mounted on said equalizing bar and extending rearwardly therefrom, a spacing bar pivotally mounted upon the plow and connected to said draft device for maintaining the latter in predetermined relation at the side of the plow, said draft device adapted for connection with an implement co-operatively positioned with respect to the )low.

1 3. An implement draft device for use with a tractor and a plow connected to the tractor by an automatically releasable hit-ch, com- 'ng a flexible draft connecto ear adjustabl i i i I, a .o a xet caiii y the ilr-Li'Ol slidaoiy engaging one end or the equalizing bar, means for pivotally mounting the opposite end of the equalizing bar on said plow hitch and admitting of the release of the equalizing bar from the bracket when said plow hitch is released, and a spacing member adapted to be mounted on the plow and engaging said flexible connector to maintain the same in definite relation with respect to the plow.

d. A hitch for implements adapted to be drawn behind a plow which is driven through an automatically releasable hitch by a tractor, comprising a flexible connector adapted for attachment to the implement at the rear end of the connector, an equalizing bar adjustably connected to the forward end of the connector, 9. draft bracket adapted to be V for mounted on the tractor and slidably engaging one end of the draft bar, means for pivotally connecting the other end of the draft bar to the plow draft connection, and a spacin bar carried by the plow and engaging said flexible connector to maintain the same in a definite relation at oneside of the plow 5. An implement hitch for application to an automatically releasable hitch between a tractor and a plow, comprising an equalizing bar adapted for pivotal mounting at oneend upon the plow hitch, a draft bracket adapted to be mounted on a tractor and slidably engaging the opposite end of the-equalizing bar and admitting of the escape of the bar from the bracket when the plow hitch is uncoupled, a draft connector adj ustably mounted on the equalizing bar and extending rearwardly for attachment to an implement behind the plow, and a spacing bar pivotally mounted upon the plow and extending laterally therefrom and connected to said draft connector for maintaining the same in a definite predetermined relation with respect to the plow to insure the correct draft of the implement behind the plow. t

6. An auxiliary releasable hitch for vehicles comprising a draft connector, an equaliz-,

ing member connected therewith and with one of the vehicles, means at one end of said equalizing member for releasably holding said equalizing member in connection with another of the vehicles, and admitting of the release of the equalizing member when the main hitch is released, and a spacing mem' ber carried by the last mentioned vehicle and engaging the draft connector to maintain the same in definite relation with respect to the vehicles.

7. In combination with a traction device, a main trailing vehicle and auxiliary trailing vehicle, a main automatically releasable hitch between said traction device and said main trailing vehicle, of a member adapted vehic at is other end in the keeper plate, a spacing bar pivotally mounted upon said main trailing vehicle, a draft device adj usta-bly mounted upon said equ alizationbar and extending rearwardly therefrom for adjustable connection to said spacing bar, said draft device adapted for connection with said auxiliary trailing vehicle cooperatively positioned with respect to the main trailing vehicle.

8. In combination with a traction vehicle,

a main and an auxiliary trailing vehicle, a

main automatically releasable hitch between said traction vehicle and said main trailing vehicle, and adjustable draft connector and a spacing member, said equalization member being pivotally connected to said main trailing veof a bracket, an equalization member,

hide and slidably releasable from saici bracket upon release of the main aut0mati- Cally releasable hitch, said adjustable draft connector being positioned between saicl equalization member and said spacing memher, said spacing member adapted for mounting upon said main trailing vehicle for adjustable connection with said auxiliary trailing vehicle to maintain the latter in a predetermined relation with respect is said main trailing vehicle.

ANDRE W LANG.

4 Less 

